Method of forming concrete piles.



R. J. BEALL, Ja. METHOD 0I' FOBMING GONORBTB PILES.

.LPPLIOATIDH FILED APB.28, 1904.

Patented Aug. 1,1911.

UNITED STATES PATENT OFFICE.

RICHARD J. BEALL, JR., OF WASHINGTON, DISTRICT OF COLUMBIA.

METHOD OF FORMING CONCRETE PILES.

To all whom 'it may concrn:

Be it known that I, Rien/mn J. BEALL, Jr., a citizen ot the United States, residing at Washington, in the District of Columbia, have invented an lmproved 4Method of Forming Concrete Piles, of which the following is a specification.

My invention relates to that. method of forming piles of concrete or cement which consists in first driving a preparatory pile into the ground and then withdrawing said preparatoryr pile` and filling the opening formed thereby with concrete or cement in fluid or plastic form which when it becomes set will form the permanent pile.

The object of my invention is to fill. the openings with concrete or cement in a more acceptable manner than heretofore, thereby producing a better pile.

In the accompanying drawing: Figure 1 is a vienr illustrating the method of form ing the opening in the ground by means of the preparatory pile in accordance with my invention. F ig. 2 is a view illustrating the method of forming the permanent pile in accordance with my invention.

The preparatory pile 1 is in the form of a metal tube. and is provided at the top with a suitable driving-head 2, and at the bottom with a point 3, which is detachable from the pile 1, and in the present instance of so much greater diameter than the pile 1 that there is no likelihood of the latter coming in contact to any material extent with the walls of the opening formed by driving the pile. Hence the pile can be driven Without. that excessive friction which results from the contact of the earth with thesides of the pile when the latter is of cylindrical form or tapers inwardly from the top to the bottom, the improved pile being also capable of easy withdrawal, owing to the fact that the point. 3 is pern'iitted to remain at the bottom of the opening and the pile 1 is free from any material contact with the Walls of the opening above said point.

After thc hollow pile has been driven to the proper depth the concrete poured into the same, and when a suiicient quantity has accumulated at the bottom of the pile above the "point said pile is withdrawn either slowly and continuously or intermittently, a little at a time. and during .auch with dran-'al the. supply of concrete to the interior ot the pile is continued. so that the concrete will escape into the opening above Specification of Letters Patent.

Application tiled April 28, 1904.

Patented Aug. 1, 1911. Serial No. 205,399.

the point, as shown in Fig. Q, until by the time the pile is completely Withdrawn the opening will be filled 'withconclete The concrete is introduced into the hollow pile at such Ya rate as always to maintain a head of concrete at the bottom of the same,

` so that in case the opening is formed in wet ground or beneath the Waterslevel the Water cannot gain access to the interior of the hollow pile, or will be displaced upwardly as the concrete escapes from the lower end of the pile and into the opening. By this means caving in of the Walls of the opening when the4 latter isformed in unstable ground is effectually prevented and the concrete pile when it becomes set is a heirlogeneous structure possessing all needed strength.

The point can be made of Aany suitable shane. and of Wood, cast or Wrought iron, steel, glass, asphaltum, concrete, or combinations ot the same, or, in fact, of any material which 4tvill withstand the shock of driving, preference being given to a point of concrete, which may if desired be sheathed with sheet-metal, except at the top, or internallvreinforced to strengthen it, as the plastic c ncrete of which the pile is composed Wi l take a better hold upon such concrete point than upon a. metal or other point not affording vso ood a holding surface.

This method oforming the concrete pile may be adopted in connection with the use of any hollow preparatory pile open at the bottom for the escape of concrete therefrom as the preparatory pile is Withdrawn, said hollow pile being introduced by driving. sinkingugor any other available manner.

Having described my invention, what I claim as new, and desire to secure by Let` ters-Patent, is:

1. A method of `forming concrete piles in the ground. consisting in drivingr in the ground a tube having an unobstructed longitudinal bore and an enlarged point closing the lower end of the tube and detachable therefrom .forming an openingr of greater diameter than the tube, withdrawing the tube Without the shoe, and iilling the openi ing above said shoe with concrete deposited in` the tubel during the Withdrawalot the same.

Q. The method of forming concrete piles. which consists in providing a hollow pile with an enlarged and detachable point. sinking said pile into the ground to form a hole larger v4"than the pile-stem, then slowly or intermittently withdrawing the pile, without its'pointfiandiilling the hole above said point, with conoret n'ing such withdrawal of the pile, and. Elli permitting lthe e011- crete to set, substantially as specified.

3. The method of forming concrete piles, which consists in providing a hollow pile with a detachable point composed of concrete, sinking said pile into the ground to form a'hole, then s owly or intermittently withdrawing the pile, without the point, and flllingr the hole above said oint, with concrete during such withdrawa and then permitting the concrete to set, sulostantially as speeied. v

.4. The method of forming concrete piles,

which consists in providing a hollow pile with anV enlarged and detachable concrete point, sinkin said ile into the ground to form `e hole t arger t an the pile-stem, then slowly or intermittently withdrawing the pile, without the point, and filling the hole above said point with concrete during such withdrawal, and then permitting the concrete to set, substantially as specified.

In testimony whereof I have signed my name to this Specification in the presence of two subscribing witnesses.

RICHARD J'. BEALL, JR.

Witnesses:

EMonY H. boGLnY, H. L. BEALL. 

